Base support



FIG. 1 is a front, left, top perspective view of the base support;

FIG. 2 is a rear, right, top perspective view of the base support;

FIG. 3 is a front view of the base support;

FIG. 4 is a rear view of the base support;

FIG. 5 is a top view of the base support;

FIG. 6 is a bottom view of the base support;

FIG. 7 is a left side view of the base support;

FIG. 8 is a right side view of the base support; and,

FIG. 9 is a front, left, top perspective view of the base support in its environment.

The broken lines are directed to environment and are for illustrative purposes only. The broken lines form no part of the claimed design. 

CLAIM The ornamental design for a base support, as shown and described. 